Apparatus for treating water.



G. ORNSTEIN.

APPARATUS FOR TREATING WATER. APPLICATION FIILED MAY 9. I913.

Patented July 17, 1917.

2 SHEETSSHEET T.

G. ORNSTEIN. APPARATUS FOR TREATING WATER. APPLICATION FILED MAY 9. m3.

Patented July 17, 1917..

2 SHEETS-SHEET 2.

Twy a-War:

enoiae OBNSTEIN, or NEW YORK, N. Y.,

COMPANY, A CORPORATION on NEW YORK.

ASSIGN'OR TO ELECTED BLEACHINGGAS APPARATUS roa TREATING WATER. I

Specification of Letters Patent. I

Application filed May 9, 1913. Serial No. 766,502.

ORNsTEIN, a

' tain new and useful Improvements in Ap aratus for Treating Water,fully descri ed and represented in the followin specification and theaccompanying drawmgs, forming a part of the same.

This invention relates to apparatus for treating water, and moreparticularly to means whereby in an apparatus or system for adding atreating agent to flowing water the rate at which the treating agentv isadded or supplied to the flowing water will be automatically controlledaccording to the quantity of water flowing.

The invention has been made es ecially with the idea of providing apractical reliable apparatus whereby a sterilizing gas, and moreparticularly chlorin, may be added in suitable relatively smallproportionate and automatically regulated amounts to flowing water, suchas the water of city or town supplies or sewage or other watery liquids.

Chlorin in its free state is a very powerful sterilizing agent orantiseptic, as little as 0.1 to 0.4 parts of free chlorin per millionparts of water being suflicient to substantially sterilize most river orlake water, provided the chlorin is uniformly distributed through thewater before it has had time to disappear as free chlorin, entering intocombination and losing to a large degree its sterilizing power. Morecontaminated water, such as sewage, requires, of course, aproportionately greater amount of chlorin for its purification. The useof an excess of chlorin in ster izin water over the amount necessary fore ecting the desired result is objectionable from the standpoint In U.S. Patent No..

a process and apparatus whereby chlorin Patented July 17, 191?.

may be supplied in determined amounts and uniformly distributed througha flowing body of water. A principal object of the present invention isto provide means for automatically varying the rate of supply of chlorininapparatus such as shown in said patent and in carrying out the processthere- V in described. The invention is not, however, limited in its useto the apparatus and process of said patent, but it is adapted to be,and may be, used as applied to, and in connection with, other forms ofapparatus and in carrying out other processes of treating water withchlorin, and generally in adding treating agents to flowing water.

It has been proposed heretofore to automatically control and regulatethe quantity of a treating gas supplied to flowing water according tothe quantity of water flowing, but the apparatus heretofore proposed forsuch purpose has, as far as I am aware, been unsatisfactory andunsuitable for use under conditions commonly met with, especially intreating water of town and city water supplies. In accordance with thepresent invention, I regulate the rate of supply of the chlorin or otherpurifying agent by -water, and, therefore, in the quantity of waterpassing. Such a difference in pressure in the water flowingin a closedconduit may be developed by various means. In most city and town watersupplies and sewage systems, the water, using the term .in the broadsense to include sewa e and other watery liquids, is caused to owthrough closed pipe lines or. conduits, and it is customary to interposein the conduit at a suitable point a Venturi tube for the purpose ofmeasuring the flow of water by means of a Venturi meter. I find thatsuch a Venturi tube, either one installed in the conduit for the purposeof measuring the flow or quantity of the water passing by means of aVenturi meter or one especially installed for my purpose, provides amost suitable means in connectlon with other parts or features of myapparatus for proportion ately regulating the supply of chlorin or linga regulating device whereby the rate of supply of the chlorin to theflowing wateris regulated, and, most advantageously, I control by suchdifference in water'pressure a pressure reducing and regulating valve ordevice interposed in the su ply line leading from a source of supply 0chlorin under pressure, and whereby the ressure under which the gasreaches an passes through a suitably provided measuring orifice isdetermined. By such means ver accurate proportionate control of the chorin supplied is secured for varying quantities of water flowing pastthe place where the chlorin is added thereto.

A full understanding of the invention can best be given by a detaileddescription of an approved form of apparatus embodying the same, andsuch a description will now be given in connection with the accompanyingdrawings illustrating apparatus for carrying out the process of treatingor antisepticlzlng water set out in my said patent and embodying thefeatures, of the present invention in an approved form. In 'saiddrawings:

Figure 1 shows such ap aratus more or less diagrammatically in s1 eelevation with parts shown in section;

Fig. 2 is an enlarged view partly in section of the automaticallyoperating pressure controlling devices and associated parts of theapparatus shown in Fig. 1;

Fig. 3 show more or less diagrammatically an alternative form ofapparatus.

Referrin to the drawings, the apparatus shown in ig. 1 is one in whichthe desired result of adding a definite quantity of chlorin to the waterto be treated is secured by supplying the chlorin gas at a measured ratecausing it to be absorbed by a minor flow or water, and then discharginthe chlorinated minor flow of water direct y into the main body of waterto be treated. The apparatus comprises an absorption tower 10 throughwhich the minor flow of waterpasses downward to absorb an upwardlymoving current of chlorin gas. The absorption tower may be formed of avertically set shell of earthenware or other suitable material resistantto chlorin, filled, or substantially filled, with broken stone, coke, orother distributing material adapted to film out the water and cause itto present an extended area of surface for contact with the ascendingcurrent of gas. The tower should be provided with a vent as at 11whereby the pressure within the tower is maintained at, or substantiallyat, atmospheric ressure. Water issupplied to the top of t e towerthrough a supply pipie 12 provided with a shuteofi valve 13 an aregulating valve 14.

pressure reducing and regulating means which as shown is formed by anadjustable reducing and regulating valve 20, and between such reducingvalve and the tower there is a fitting 21 formed to provide a measuringor flow controlling orifice which is most advantageously a fixed orificeof known size to serve as a fixed or known measuring orifice; andbetween the fitting 21 and the valve 20 a suitable gage 22 is providedfor indicating the pressure under which the gas reaches the measuringorifice. In order to secure practical constancy in the pressure at themeasuring orifice under varying supply pressures, such as are apt toresult, for example, when the gas is drawn in considerable quantity froma tank of compressed and liquefied chlorin continuously for acomparatively long time, and in order to reduce the drop in pressurepast the valve 20 and thus secure more accurate regulation of thepressure on the delivery side of such valve in response to adjustment ofthe valve, a second reducing and regulating valve 25 may be and is bestprovided between the tank or source of supply and the valve 20. Thisvalve 25 may be provided with a pressure gage 26 for show ng itsdelivery pressure or a suitable gage for showing such pressure otherwiseprovided; and it is convenient, also, to have a third pressure gage 27between the tank and the valve 25. The pipe 16 is also shown asprovided, as in a form of apparatus shown in my said patent, with aprotecting coil 28 which extends downwardl beyond the measuringv orificeto protect the measuring and flow adjusting apparatus from moisturewhich might otherwise difi'use backward through the pipe from thetower.. The chlorinated water from the tower is discharged through apipe 30 to be united with the body of flowing water to be treated, andas here shown the pipe 30 leads directly into the conduit 31 throu hwhich the water to be treated flows, suc an arrangement being suitablewhen the pressure in the conduit is not greater than would be overcomeby the head of water in the pipe 30 resulting from the elevation of thetower above the conduit. The minor flow of water will thus, after beingchlorinated in the 12, the chlorin gas rising upward through the towerwill be absorbed by the downflowing water and continuously carried awaythrough the pipe 30 to be supplied to the water flowing through theconduit 31 at the rate at which the chlorin gas is supplied to thetower. The rate at which the chlorin is supplied to the water to betreated will thus be that at which the chlorin gas passes the measuringorifice 21, and the rate of flow past the measuring orifice will dependupon the pressure under which it reaches the orifice and will,therefore, be controlled by the adjustable pressure reducing valve 20.The pressure at the measuring orifice, moreover, will be shown by thegage 22 and if the orifice is of known size, the quantity of chlorlnbeing supplied, or the rate of flow, at any time may be readilydetermined from a reading of the gage, and conversely the rate of flowor supply of chlorin may be adjusted by adjusting the valve 20 accordingto the indications of the gage 22. The supply of water to the towerthrough the pipe 12 shouldbe adjusted so that there will be enough waterflowing through the tower to completely absorb all the entering chloringas, andmay be in such quantity as to result in a solution of greater orless strength as desired. Obviously, the exact amount of water flowingthrough the tower is immaterial, since whatever the strength of thesolution produced, chlorin will be supplied to the water flowing throughthe conduit at the rate at which it enters the tower provided thechlorinated water .is allowed to flow freely from the tower into theconduit. It is advisable, however, to use a considerably greater flow ofwater throu h the tower than is required to absorb t e chlorin, since byusing such greater amount a better distribution of the chlorin throughthe water to be treated is secured.

In order to regulate the supply of chlorin proportionately to thequantity of water flowing through the conduit 31, there is provided inthe apparatus shown in the drawings. means controlled by the differencein pressure developed by a Venturi tube interposed in the conduit 31 foradjusting or controlling the valve 20. The Venturi tube is indicated at35. From two suitable points of diflerent pressures, as from the pointof narrowest cross-section,

him.

or critical point, of the Venturi tube, and from a point at or adjacentto the beginning or inlet end thereof, lead pressure pipes 36 and 37,respectively, which re-, spectively connect with inlet passages 38 and39 opening into opposite ends of a closed chamber which, as shown, isformed by a short cylinder 40. The differential pressure pipes might, ofcourse, lead from other suitable separate-d points between which adifi'erence in pressure is developed by the Venturi tube. Fitted withinthe cylindrical differential pressure chamber thus provided is a piston41 which stands between the inlets 38 and 39. Pressure will thus beexerted on one side of the piston 41, the lower side as shown in Fig. 2,equal to the pressure in the water conduit at the point where the pipe36 connects ,with the conduit, that is, at the critical point of theVenturi tube as shown in the drawings; and

a pressure will beexerted on the other or upper side of the piston equalto the pressure in the conduit at the point where the pipe 37 enters theconduit; and when the.

water is flowing through the conduit the pressure on the upper side ofthe piston will thus be greater than the pressure on the lower sidethereof, and the piston will tend to move downward.

A piston rod 42 extends upward from the piston 41 through a suitablestufiing box 43 and through a guide 44 and is connected to actuate andcontrol the adjusting rod 45 of the valve 20. As shown, the connectionbetween the piston rod and the valve rod is by means of a lever 46pivotally connected at one end to the piston rod and mounted to rock ona fulcrum 47, the position of which in the direction of the length ofthe lever is adjustable for varying the power exerted on the valve rodrelatively to that exerted by the piston. To provide for such adjustmentof the fulcrum, it comprises a fulcrum pin extending between verticalguide plates 48 and through a longitudinal slot formed in the lever, andit is mounted-to slide in a guideway 49 on which it is movedlongitudinally of the lever and held in any desired. position of adjustment by means of an adjusting screw 50 working through a threadedlug 51 extending downward from the fulcrum. The actuating end of thelever has operative connection provided which as shown consists of alever '54 pivotally mounted with its'short arm engaging to bear upwardon the piston rod 42 and with its long arm carrying an adjustable weight55 The pressure reducing and regulating valve in the apparatus shown isof the spring controlledtype having a valve controlling diaphragm whichis subject to the pressure of the outgoing gas on one side to move thediaphragm to close the valve orifice, and which is moved in the-otherdirection, or to open the valve orifice, by the pressure or tension of aspring which is adjustable to vary such opening force exerted on thediaphragm, thereby varying the gas.

pressure on the outlet side of the valve under which the diaphragm willbe moved to close the valve orifice and at which pressure the gas on theoutlet side of the valve will, therefore, be maintained. In the valveshown in the drawings, the diaphragm 60 forms one side of a valvechamber 61 from which the gas is discharged through an outlet opening62, and carries a seat 63 which by movement of the diaphragm underpressure of'the gas in the chamber closes against a gas inlet nozzle 64.The diaphragm is subjected to the pressure of a spring 65 which tends tomove the diaphragm against the pressure of the gas in the chamber 61 tocarry the seat 63 away from'the gas inlet nozzle. For delicacy ofoperation, this spring is best arranged to act directly against theouter side of the diaphragm. For adjusting the spring to vary thepressure under which the gas is supplied from "the valve, the outer endof the spring is supported'by means of the adjusting rod 45, which ashere shown is a sliding rod, the position of which is controlled by thepressure exerted thereon by the piston 41 acting through the lever 46.It will be observed that in the apparatus shown, the varying powerexerted by the piston 41 through the lever 46 is transmitted directly tothe valve spring 65 and through the spring to the diaphragm 60, thespring thus serving as means for exerting a gradually increaslngopposition to the downward movement of the "piston .41, and also%s thedirect means for exerting yielding pressure on the diaphragm 60 to openthe valve.

In the form of-apparatus ,shown in the drawings, the various parts oftheautomatic controlling apparatus are carried by a chambered edestal 70.The c linder 40 forming the di erential pressure chamber is mounted onthe pedestal near its base and the inlet passages 38 and 39 connectthrough the wall of the pedestal with separated chambers 71 and 72 withwhich the pressure pipes 36 and 37 are respectively connected. The valve20 is secured to the opposite side of the pedestal from the cylinder 40and near the top thereof, and the outlet passage 62, from the chamber61' of the valve leads throughthe wall of the pedestal into a chamber73. The

chlorin supplypipe 16 is connected directly with the valve on. itssupply side, and the continuation of the pipe 16 leads from the chamber73, being connected therewith through the fitting 21 which provides themeasurlng orifice, and which fitting may be The gage 22 will usually bea sight read-' ing gage, and in order that a record shall be made of thepressure under which the chlorin reaches the measuring orifice, and,therefore, of the rate of supply, it is desirable to provide also arecording gage. Such a recording gage for making a continuous record isshown at 75 in Fig. 1 mounted on the edestal and connected with'thechamber 3.

In the operation of the apparatus, the shut-oil valve 17 being open andreducing valve 25 being set to effect a suitable reduction in thepressure of the chlorin gas, the amount of gas passing to the tower 10Wlll then depend upon the adjustment of the valve 20, that is, on thepressure under which the gas reaches the measuring orlfice 21. 'The gasentering the lower part' of the tower will be absorbed by the minor flowof water passing downward through the tower and the chlorinated waterwill be continu ously supplied through the pipe 30 to the water flowingthrough the conduit 31. The rate at which the chlorin is supplied to thewater to betreated will thus depend upon the pressure under which thegas reaches the measurin orifice 21 and will be controlled by thead]ustable pressure reducing and regulating valve 20, as hereinbeforepointed out.

' When water is flowing through the conduit 31, there will be a drop inpressure from the entrance end of the Venturi tube to the critical pointthereof, and the difference in pressure between two longitudinally searated points, as the points at which the tu cs 36 and '37 enter, Wlllvary closely with the square of the velocity of flow of the water therate of flow of water through the conon the diaphragm 60 is insufficientto over-v duit and will vary approximately in proportion to the squareof the velocity of the water flowing through the conduit, or accordsuchorifice opened so long as, and whenever, the pressure in the chamber 61acting come the pressure of the spring. Thepressure in the chamber 61and in the chamber 73 and, therefore, the pressure under which the gasreaches the measuring orifice 21, will thus be controlled by the piston41, and will be varied proportionately, or approximatelyproportionately, to the square of variations in flow of the waterthrough the conduit 31; and since the amount of gas passing through theorifice 21 varies proportionately to the square root of the pressure ofthe 'gas reaching the orifice, the amount of gas supplied to the tower10 and theamount of chlorin supplied to the water in the conduit 31 willbe varied approximately in direct propor- 41 for any given rate of flowofv water through the conduit 31 may be varied and the valve thusadjusted to give the desired rate of fiow of chlorin according to thepro ortionate amount thereof to be added to t e water. In using theapparatus, therefore, the fulcrum will beadjusted until the desiredproportionate supply ofchlorin is secured, and thereafter undervariations in flow of water through the conduit this proportionatesupply of chlorin will be approximately maintained. The size of themeasuring orifice 21 being known, the rate ofsupply of chlorin-may bedetermined from a reading of the gage 21 and adjustment of.

the rate of chlorin supply may, therefore, bemade according to theindications of the gage for any known rate of flow of the water in theconduit 31 and similarly therate of chlorin supply may be determined anytime in order to eheck up the operation of the chlorinating apparatuswith the quantity" of water being treated. Of course, the proportionateamount of chlorin being added to the water may be determined, correctlyby testing the chlorinated water, and such tests may also be made forchecking up the operation of the apparatus. An adjustable measuringorifice might also be em loyed in place of, or in addition to, the ajustment of the fulcrum 47 foradjusting the proportionate amount ofchlorin added to the water, but it is of advantage to use a fixedorifice of known size as will be readily under;- stood. In order thatthe valve shall be operated to shut ofi the supply of chlorin when nowater is flowing through the conduit, the counterweight 55 should beadjusted so as to counterbalance the weight of the piston 41 and otherconnecting parts, and, on the other hand the adjustment of the weightshould be such that chlorin will be supplied as soon as any substantialdifferential pressure acting on the piston 41 is developed.

It should be noted that in the construction shown in Figs. 1 and 2 themaximum extent of movement of the piston 41 and valve rod 45 andconnecting parts and of the counter balancing lever 54 is comparativelyvery small, so that any disturbing factors which would result from moreextensive movements of such parts maybe disregardeda In Fig. 3 I haveshown an' alternative I form of apparatus-in which the differentialpressure operating means, instead of having its power transmitteddirectly to the spring of the pressure regulating valve 20 through asliding valve stem, is connected to turn a screw stern whereby thetension of the valve spring is adjusted. In the particu-- lar apparatusshown in Fig. 3, the differential pressure operating means is the sameas shown in Figs. 1 and 2, comprising a cylinder 40 with its piston 41,the cylinder being connected by the pressure pipes 36 and 37 with theconduit at points of different pressures produced by the Venturi tube35. The piston rod 42, however, carries a suitably guided rack. 80 andworks against a spring 81 which ofiers a gradually increasing resistanceto the downward movement of the piston. The spring may be mounted on acontinuation of the piston rod or rack to bear upward against a collar82 which is adjustable for varying the tension of the spring. The rack80 meshes with an intermediate gear 83 which engages and turns a pinion84 on the stem 85 of the pressure reducing and regulatpressure on thevalve spring, thereby increasing the delivery pressure of the chlorinand increasing the rate of supply of the chlorin .to the absorptiontower; and when the piston 41 is moved upward with a decrease in therate of flow of water in the conduit, the valve stem will be moved inthe opposite directionto adjust the valve 20 to decrease the gaspressure and thereby lessen the rateof supply of the chlorin to theabsorption tower. In this figure I have shown the pipe 30 as arranged todischarge the chlorinated water into a well 90 interposed in the conduitinstead of into the. conduit proper as in Fig. 1.

The extent of movement of the rack 80 under the power exerted by thepiston 41 against the power of the spring 81 will be in directproportion to the power exerted by the piston, that is, in proportion tothe pressure difference exerted on the piston; or in proportion to thesquare of the velocity of the water flowing through the conduit; andsincethe amount of turning movement imparted to the valve stem 85 is indirect proportiontto the movement of the rack 80, the extent oflongitudinal movement of the valve rod and the compression of the valvespring, and therefore, the pressure under which gas is supplied by thevalve 205, will vary directly in proportion to variations in thepressure difference acting on the piston 41; and since the amount of gaspassing through the orifice 21 varies proportionately to the square rootof the pressure under which the gas reaches the orifice, the amount ofgas supplied to the tower 10 and the amount of chlorin supplied to theflowing water, will be varied, as'before, approximately in directproportion to variations in a the amount of water flowing through theconduit. In using the apparatus, the pressure of the spring 81 will beadjusted to give the desired rate of supply of chlorin for any givenrate of flow of water through the conduit, such adjustment being madeaccording to the indications of the gage 22 as before described inconnection with Figs. 1v

and 2.

It will be understood that the invention is not to be limited to theexact construction and arrangement of parts as shown in the drawings andto which the foregoing de scription has been largely confined, but thatit includes changes and modifications within the claims. By theexpressions pressure regulating, means and pressure regulating valve asused in the claims is meant such a regulating means as operates auto=matically to maintain for any adjustment thereof a constant supplypressure of the treating gas, such for example, as the pressure reducingand regulating valve shown and described herein.

What is claimed is:

1. Apparatus for treating flowing water, comprising means for supplyinga treating gas to the water, an adjustable automatically operatingpressure regulating valve for controlling the rate of supply of thevarying rates of flow of water a fixed ratio between the rate of supplyof the treating gas and the rate of flow of the water.

2. Apparatus for treating flowing water comprising means for supplying atreating gas to the water, adjustable automatically operating pressureregulating 'means for controlling the rate of supply of the treatinggas, means for producing a difi'erence in pressure between separatedpoints in the flowing water, and differential pressure actuating meanscontrolled by such difference in pressure and operating to adjust saidpressure regulating means to maintain for varying rates of fiow of thewater a fixed ratio between the rate of supply of the treating gas andthe rate of flow of the water.

3. Apparatus for treating water flowing through a conduit comprisingmeans for supplying a treating gas to the water, pressure regulatingmeans for controlling the rate of supplyof the treating gas, means forproducing a diflerence in pressure between separated points in the waterflowing through the conduit, difierential pressure,

actuating means connected with the conduit at points of differentpressures and controlling said pressure regulating means to maintainforvarying rates of flow of the water a fixed ratio between the rate ofsupply of the treating gas and the rate of flow ofthe water, andadjusting means intermediate said pressure regulating means and saiddifi'erential pressure actuating means for varying the ratio between therate of supply of the treating gas and the rate of flow of the water.

4. Apparatus for treating water flowing through a conduit comprisingmeans for supplying a treating gas under pressure, means including anadjustable automatically operating pressure reducing and regulatingdevice for controlling the rate of ,supply of the treating gas, meansfor producing a difl'erence in [pressure between separated points in thewater flowing through the conduit varying approximately with the squareof variations in the rate of flow of the water, and difl'erentialpressure actuating means connected with the conduit at points ofdifferent pressures and controlling said pressure reducing andregulating device to vary the rate'of supply of the treating gasapproximately in direct proportion to variations in the rate of flow ofwater through the conduit.

5. Apparatus for treating water comprisin a closed conduit for the waterto be treate a source of supply of gaseous chlorin under pressure, meansfor supplying said chlorin to the water to be treated, means forcontrolling the .rate of supply of the chlorin including a measuringorifice and a pressure reducing and regulating valve which determinesthe pressure under which the gaseous chlorin reaches the measuringorifice, means for producing a difference in pressure between separatedpoints in the water flowing through the conduit, means controlled bysuch diflerence in pressure for controlling said pressure reducing andregulating valve to vary the rate of supply of the chlorin withvariations in the rate of flow of the .water in the conduit, andadjusting means for varying the rate of supply of the chlorin for anygiven rate of flow of the water.

6. Apparatus for treating water comprising a conduit for the water to betreated, a Venturi tube interposed in said conduit, a source of supplyof a treating agent under pressure, means for supplying the treatingagent to the water, means including a spring actuated pressure reducingand regulating valve for controlling the rate of supply of the treatingagent, diflerential pressure chambers connected with the interior of theconduit at longitudinally separated points, the connection of one ofsaid chambers with the conduit being at a point of relatively lowpressure in the Venturi tube, and means controlled by the difl'erencebetween the pressures in said chambers and connected to control saidreducing valve to vary the supply of the treating agent with variationsin the rate of flow, of water through the conduit.

7. Apparatus for treating flowing water comprising a source of gaseouschlorin, means for producing a separate minor flow of water, means forsupplying a controlled amount of such chlorin to said minor flow ofwater to be absorbed thereby, means for supplying the minor flow ofwater so treated to the main flow of water to be treated, andautomatically acting means for controlling the rate of supply of suchchlorin to the minor flow of water to maintain for varying rates of flowof the water to be treated, a fixed ratio between the rate of supply ofchlorin and the rate of flow of the water to be treated.

8. Apparatus for treating flowing water comprising a source of gaseouschlorin means for producing aseparate minor flow of water, means forsupplying a controlled amount of such chlorin to said minor flow ofwater to be. absorbed thereby, means for supplying the minor flow ofwater so treated to the main flow of water to be treated, meanscontrolled by the difference between the pressures at two points in theflowing water for controlling the rate of supply of such chlorin to theminor flow of water to maintain for varying rates of flow of the waterto be treated a fixed ratio between the rate of supply of chlorin andthe rate of flow of the water to be treated.

9. Apparatus for treating flowing water comprising means for producing aseparate minor flow of water, a source of'supply of gaseous chlorin.under pressure, means for supplying said chlorin to said minor flow ofwater to be absorbed thereby, a. pressure reducing and regulating valvefor controlling the rate of supply of the chlorin, means for supplyingthe minor How of water so treated to the main flow of water to betreated, and means controlled by the main How of water for controllingsaid pressure reducing and regulating valve to maintain for varyingrates of flow of the water to be treated a fixed ratio between the rateof supply of chlorin and-the rate of flow of the water to be treated.

10. Apparatus for treating water comprising a conduit for the water tobe treated, a Venturi tube interposed in said conduit, a source ofsupply of gaseous chlorin, means for producing a separate minor flow ofwater, means for supplying a controlled amount of such chlorin to suchminor flow of water to be absorbed thereby, means for supplying theminor flow of water so treated to the water flowing through saidconduit,and means controlled by a pressure difference developed by the Venturitube between separated points in the water flowing through the conduitfor controlling the rate of supply of chlorin to the minor flow ofwater, whereby under varying rates of flow of water through the conduitthe rate of supply of chlorin will be maintained approximately at afixed ratio to the rate of flow of water.through the conduit.

11. Apparatus for treating water comprising a conduit for the water tobe treated, a Venturi tube interposed in said conduit, a source ofgaseous chlorin, means for supplying such chlorin to the water flowingthrough said conduit, regulating means for controlling the rate ofsupply of the chlorin,

a controlling member, means for subjecting said member to a'moving forcewhich varies proportionately with variations in the pressure differencedeveloped by the Venturi tube between separated points in the flowingwater, and connections between said member and said regulating means,whereby the supply of chlorin will be varied approximately in directproportion to variations in the rate of flow of water through theconduit.

12. Apparatus for treatin flowing water, comprising means for supp yinga treating gas under pressure, means providing a controlling orificethrough which the treating gas passes, adjustable automaticallyoperating pressure reducing and regulating means for controlling thepressure under which the treating gas reaches the controlling orifice,and means controlled by a pressure difl'erence developed by the flowingwater and operating to adjust said pressure reducing and regulatingmeans to maintain for varying rates of flow of water a fixed ratiobetween the rate of supply of the treating gas and the rate of flow ofthe water.

13, Apparatus for treating flowing water comprising means for supplyinga treating gas under pressure,pressure reducing and regulating means forcontrolling the rate of supply of the treating gas, means for supplyingsaid gas to the water to be treated, and differential pressure actuatingmeans controlled by a pressure difference developed by the flowing waterand: operating to adjust said pressure reducing and regulating means'tomaintain for varying rates of flow of the water a fixed ratio betweenthe rate of supply of the treating gas and the rate of flow of thewater. J

14. Apparatus for treating flowing water, comprising means for supplyinga treating gas to the water, an adjustable automatically operatingpressure reducing and regulating valve for controlling the rate ofsupply of the treating gas, and differential pressure actuating meanscontrolled by a pressure difference developed by the flowing waterandoperating to adjust said valve to maintain for varying rates of flowof water a fixed ratio between the rate of supply of the treating gasand the rate of flow ofthe water.

15. Apparatus for treating flowing water,

comprising means for supplying a treating gas to the water, adjustableautomatically operating pressure regulating means for controlling therate of supply of the treating gas, a member controlled according to apressure difference developed by the flowing water, a connection betweensaid member and said regulating means for adjusting said regulatingmeans to maintain for varying rates of flow of water a fixed ratiobetween the rate of supply of the treating gas and the rate of flow ofthe water, and adjusting means for varying the ratio between the rate ofsupply of the treating gas and the rate of flow of the water.

16. Apparatus for treating flowing water, comprising means for supplyinga treating gas to the water, adjustable automatically operatingvpressure regulating means for controlling the rate of supply of thetreatsaid pressure regulating means to vary the rate of supply, andmeans for subjecting said controlling member to a moving force whichvaries proportionately with variations in the quantity of the waterto'be treated flowing, whereby the supply of the treating 'erted by saidspring and thereby vary the supply of the treating agent proportionatelyto the rate of flow of the water.

18. Apparatus for treating flowing water comprising a source of supplyof a treating gas under pressure, means for supplying said gas to thewater to be treated, means for determining the rate of supply of saidgas including a spring controlled pressure reducing and regulatingvalve, and means controlled by the flowing water for adjusting saidvalve to maintain under variations in the rate of flow of the water afixed ratio between the rate of supply of the gas and the rate of flowof the water.

19. Apparatus for treating flowing water comprising a source of supplyof a treating gas under pressure, means for supplying said gas to thewater to be treated, means for determining the rate of supply of saidgas including a spring controlled pressure reducing and regulatingvalve, and automatic adjusting means for adjusting said valve tomaintain under variations in the rate of flow of the water a fixed ratiobetween the rate of supply of the gas and the rate of flow of the water.

20. Apparatus for treating flowing water, 100 comprising means forsupplying a treating agent to the flowing water, means for con-'trolling the rate of the supply of the treating agent including aspring-controlled pressure reducing and regulating valve, a mem- 105 bercontrolled by a pressure difference developed by the flowing water, andmeans for transmitting power exerted by said member to the spring ofsaid spring controlled valve to vary the power exerted by said spring110 and thereby vary the supply of the treating agent proportionately tovariations in the rate of flow of the water to be treated.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing 11b PAUL H. FRANKE-

